Asperger's or not....he is just keeping you there at his convenience & has no real interest in you unless he has nothing that he considers better going on in his life.....he's just telling you he loves you & that he's interested in you to keep you hanging around for his convenience.....& it's obvious by the times he doesn't "show" that you are not a high priority in his life. Don't bother waiting around for him especially with a long distance relationship.

I did that my senior year of high school & got a letter (before cell phones & texting or even email) that he got married to the girl he was dating. Lol 6 months later I got another letter telling me how bad his marriage was & he wanted out. Only thing he got from me was a "poor baby...you made your choice....live with it".

He doesn't even know you to tell you he loves you. Love grows from being together, trusting each other....anything else is wishful thinking & fantasy. Don't waste your time on this guy he's sure not wasting his time on you.